>>>Hi,
>>>
>>>>This *was* my understanding about timers: A timer does not fire during a SELECT-SQL and a next line that tests for the _TALLY. It only fires on moments that an input (most notably from a user) is possible.
>>>>
>>>>As a consequence of that understanding, there is *no* need to save/restore _TALLY in the timer event's code.
>>>>
>>>>This is about to become my understanding about timers: If _vfp.autoyield=.T. a timer can also fire after a SELECT-SQL and before the next line that tests for the _TALLY.
>>>>
>>>>As a consequence of that understanding, there *is* a need to save/restore _TALLY in the timer event's code.
>>>>
>>>>I'm now searching affirmation of my new understanding here.
>>>
>>>Well here's a crude test:
>>>

>>>DEFINE CLASS form1 AS form
>>>
>>>
>>>	Top = 0
>>>	Left = 0
>>>	DoCreate = .T.
>>>	Caption = "Form1"
>>>	Name = "Form1"
>>>
>>>
>>>	ADD OBJECT timer1 AS timer WITH ;
>>>		Top = 24, ;
>>>		Left = 36, ;
>>>		Height = 37, ;
>>>		Width = 61, ;
>>>		Name = "Timer1"
>>>
>>>
>>>	ADD OBJECT command1 AS commandbutton WITH ;
>>>		Top = 36, ;
>>>		Left = 204, ;
>>>		Height = 37, ;
>>>		Width = 73, ;
>>>		Caption = "Command1", ;
>>>		Name = "Command1"
>>>
>>>
>>>	PROCEDURE timer1.Timer
>>>		this.Enabled = .F.
>>>		SELECT id FROM Table1 WHERE id <> 1 INTO CURSOR j
>>>                * _tally: 50
>>>		this.Enabled = .T.
>>>	ENDPROC
>>>
>>>
>>>	PROCEDURE command1.Click
>>>		Application.AutoYield = .T.
>>>		thisform.timer1.Interval = 100
>>>		thisform.timer1.Enabled = .T.
>>>		FOR x = 1 TO 100000
>>>		  SELECT id FROM Table1 WHERE id = 1 INTO CURSOR viv
>>>                  * _tally: 1
>>>		  DOEVENTS   && No problem if this is not here
>>>		  IF _tally <> 1
>>>		    SET STEP ON
>>>		  ENDIF
>>>		ENDFOR
>>>		=MESSAGEBOX("Done")
>>>	ENDPROC
>>>	
>>>ENDDEFINE
>>>

>>>Only fails if the 'DOEVENTS' is immediately after the 'SELECT' and AutoYield's true. Doesn't ness. prove anything tho....
>>>Regards,
>>>Viv
>>
>>I have done your test and it suggests that my *old* understanding is the correct one and Fabio's understanding is wrong! Agree?
>
>IMHO Fabio's is right.
>Cetin

Did you do Viv's test?